Mixed mode content download warning

FYI - from Google (Chromium):

Hi there,

I do not believe that this is a regression -- none of the code involved has changed meaningfully in several releases, and the current behavior is working as intended.

 * ExemptDomainFileTypePairsFromFileTypeDownloadWarnings permits allowlisting individual extensions from "file type" warnings (e.g. "be careful, this is an executable!").
 * InsecureContentAllowedForUrls suppresses warnings that stem from the download being delivered over an insecure connection (i.e. not HTTPS).

Those warnings are distinct, and their methods for suppressing them are distinct. You might want, for instance, to permit insecure downloads from an intranet page, but that page should still not be serving executable files. Or perhaps you're not worried about apk files, but insecure sites still pose a risk.

As a result, I'm closing this as WontFix. If there was differing behavior, that's likely a bug in the prior behavior (versions prior to 124).